2003 Avalanche throwing codes immediately after transmission rebuild.

Asked by May 21, 2015 at 12:47 PM about the 2003 Chevrolet Avalanche 1500 4WD

Question type: Maintenance & Repair

I picked my truck up from having transmission rebuilt 3 days ago. Before taking it in it
ran fine except it wouldn't go into 3rd or 4th gear. Got it back, and now it is running
rough especially in idle. Ran a check on engine light and throwing codes: U1000,
P0151, P0300, P0449, and B0041 (not new... airbag something or other). Could any of
these be related to having the transmission work done? Where and how should I start
in trying to correct these issues? Thanks in advance.

1 Answer

795

I think that I had the O2 (P0151) and Emissions (P0449) on my 2009 Chevy Avalanche, last year. Everything was fine and then one day, I couldn't get out of 3rd gear (red line & still topped out at 40 - 45 mph). For me, they didn't have to rebuild my transmission, but they did have to replace the emissions solenoid and did a complete transmission fluid flush (drain, flush & refill w/clean fluid). Being that it wasn't throwing codes before the rebuild, you might want to ask them to take another look to make sure that there are no fluid leaks, you have all your fluid, no vacuum leaks. But, I know for my truck, it took the shop's senior mechanic a couple days of digging to find out how to correct those code issues; I'm not sure if a Chevy Dealership's maintenance department would be better suited for that type of work or if they'd have the same issues. Here's what I found on those codes (my apologies if this is redundant information) --- U1000 - http://www.aboutautomobile.com/TSB/2003/Chevrolet/Avalanche/Transfer+Case (4WD / Transfer Case) | P0151 - http://www.aboutautomobile.com/DTC/P0151 (O2 Sensor) | P0300 - http://www.aboutautomobile.com/DTC/P0300 (Cylinder Misfire) | P0449 - http://www.aboutautomobile.com/DTC/P0449 (Emissions Solenoid)

Your Answer

Chevrolet Avalanche Experts

  • #1
    Tom Demyan
    Reputation
    300
  • #2
    David Scott
    Reputation
    170
  • #3
    Oscar Leon
    Reputation
    150
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,247 Great Deals out of 167,963 listings starting at $1,000
Used Ford F-150
2,519 Great Deals out of 193,860 listings starting at $799
Used Chevrolet Tahoe
708 Great Deals out of 41,339 listings starting at $1,995
Used Cadillac Escalade EXT
27 Great Deals out of 607 listings starting at $4,499
Used GMC Sierra 1500
1,003 Great Deals out of 66,526 listings starting at $2,495
Used Dodge Ram 1500
369 Great Deals out of 10,765 listings starting at $1,500
Used Toyota Tundra
482 Great Deals out of 33,133 listings starting at $2,000
Used Cadillac Escalade
247 Great Deals out of 11,990 listings starting at $2,499
Used Chevrolet Colorado
269 Great Deals out of 33,734 listings starting at $1,900
Used GMC Yukon
438 Great Deals out of 22,356 listings starting at $1,995
Used Chevrolet Suburban
390 Great Deals out of 22,715 listings starting at $1,999
Used Chevrolet Camaro
409 Great Deals out of 30,592 listings starting at $2,495
Used Toyota Tacoma
589 Great Deals out of 43,856 listings starting at $2,200

Used Cars For Sale

2013 Chevrolet Avalanche For Sale
9 Great Deals out of 460 listings starting at $16,860
2012 Chevrolet Avalanche For Sale
8 Great Deals out of 257 listings starting at $10,995
2011 Chevrolet Avalanche For Sale
11 Great Deals out of 449 listings starting at $10,900
2010 Chevrolet Avalanche For Sale
10 Great Deals out of 266 listings starting at $8,995
2009 Chevrolet Avalanche For Sale
10 Great Deals out of 336 listings starting at $9,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.